-er a-a a-b a-c aaa aab aac aae aah aak aao aar ab- aba abb abc abe abh abk abo abr ac- aca acb acc ace ach ack aco acr aea aeb aec aee aeh aek aeo aer aha ahb ahc ahe ahh ahk aho ahr aka akb akc ake akh akk ako akr aoa aob aoc aoe aoh aok aoo aor ar- ara arb arc are arh ark aro arr baa bab bac bae bah bak bao bar bba bbb bbc bbe bbh bbk bbo bbr bca bcb bcc bce bch bck bco bcr be- bea beb bec bee beh bek beo ber bha bhb bhc bhe bhh bhk bho bhr bka bkb bkc bke bkk bko bkr boa bob boc boe boh bok boo bor bra brb bre brh brk bro brr c-- caa cab cac cae cah cak cao car cba cbb cbc cbe cbh cbk cbo cbr cca ccb ccc cce cch cck cco ccr ce- cea ceb cec cee ceh cek ceo cer ch- cha chb chc che chh chk cho chr cka ckb ckc ckh cko co- coa cob coc coe coh cok coo cor cra crb crc cre crh crk cro crr eaa eab eac eae eah eak eao ear eba ebb ebc ebe ebh ebk ebo ebr ec- eca ecb ecc ece ech eck eco ecr eea eeb eec eee eek eeo eer eha ehb ehc ehe ehh eho ehr eka ekb ekc eke ekh eko ekr eo- eoa eob eoc eoe eoh eok eoo eor era erb erc ere erh erk ero err haa hab hac hae hah hak hao har hba hbb hbc hbe hbh hbk hbo hbr hca hcb hcc hce hch hck hco hcr he- hea heb hec hee heh hek heo her hha hhb hhc hhe hhh hhk hho hhr hka hkb hkh hkk hko hkr hoa hob hoc hoe hoh hok hoo hor hr- hra hrb hrc hre hrh hrk hro hrr ka- kaa kab kac kae kah kak kao kar kba kbb kbc kbe kbh kbk kbo kbr kca kcb kcc kce kch kck kcr ke- kea keb kec kee keh kek keo ker kha khe khh khk kho khr kkb kkc kke kkh kkk kkr koa kob koc koe koh kok koo kor kra krc krk kro krr oaa oab oac oae oah oak oao oar ob- oba obb obc obe obh obk obo obr oc- oca ocb occ och ock oco ocr oea oeb oec oee oeh oeo oer oha ohc ohe ohh oho ohr oka okb okc oke okk oko okr oo- ooa oob ooc ooh ook ooo oor or- ora orb orc ore orh ork oro orr ra- raa rab rac rae rah rak rao rar rba rbb rbc rbe rbh rbk rbo rbr rca rcb rcc rce rch rco rcr re- rea reb rec ree reh rek reo rer rh- rha rhb rhc rhe rhh rho rhr rkb rkc rke rkk rko roa rob roc roe roh rok roo ror rra rrb rrc rrh rrk rrr

a-ak a-be a-ha a-ok aaaa aaab aaac aaae aaah aaar aaba aabb aabc aabh aaca aacb aacc aace aach aack aaco aacr aaea aaec aaha aahk aaka aake aaoe aaoo aara aarc aare aaro abaa abab abac abae abak abar abb- abba abbb abbe abbo abbr abca abcb abcc abch abcr abec abee aber abha abho abhr aboa abob aboh abok aboo abor abra abrc abro acaa acab acac acae acar acba acca accc acce acch acco ace- acea acec aceh acek acer acha ache achh acho achr acke acoa acoe acoh acor acr- acra acrc acre acro acrr aeac aecb aeer aeka aer- aera aerc aero ahab ahac ahah ahar ahha ahoa ahoe ahok ahor ahra ahrc ahre ahrr akaa akae akah akao akar akca akee aker akha akka akko akok akr- akra akre aoah aoba aoca aoce aora aorb arab arac arae arah arak arar arba arbe arbh arc- arca arce arch arco area arec aree areh arek areo arh- arka arke arkh arko aroa arob aroe aroo aror arr- arra arrc arre arrh arrk arro arrr baaa baah baak baar baba babb babe babo babr bac- baca bacc bace bach back baco baek baer baha baho bahr bak- baka bake bakh bako bakr baoh bar- bara barb barc bare barh bark baro barr bbbb bbch bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bche bcor bcra beah beak bear beba bebb bebe bebo beca bech beck beeb beek beer behr beka beke beko beo- beok beor bera berc bere berk bero berr bhao bhar bhca bhcc bher bhor bhra boab boac boak boar boba bobb bobe bobo boca boce boch bock boco boea boec boee boeo boer boha boho bohr boka boke boko boob booc booe booh book boor bor- bora bore borh bork boro borr brab brac brae brah brak brao brca brcb brce brea breb brec bree brek breo brer brka brkb broa brob broc broe broh brok broo bror brrr c-bo caaa caab caac caah caba cabe cabo cac- caca cacc cace cach cack caco cacr caec caer caha cahe caka cake caor cara carb carc care cark caro carr cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbha cbka cbko cbkr cbre cbrh ccaa ccab ccac ccar ccba ccbc ccca cccb cccc ccee ccha cche cchr ccob ccoc ccra ccrc ccre ceac cear ceba cec- ceca cece ceco ceeb ceec ceke ceor cer- cera cerc cere cero chaa chab chac chae chah chak chao char chca chce chch chea cheb chec chee cheh chek cher chha chka chkb choc choh chok choo chor chra chrb chrc chro chrr ckac ckbc ckbe ckch ckck ckco cker ckoa ckob ckoc ckoo ckor ckrc coak coba cobb cobe cobh cobo coca coce coch cock coco coha coho cok- coka coke coko coob cooh cook cor- cora corb corc core cork coro corr crab crac crar crbc crca crcc crce crcr cre- crea creb crec cree creh